Alfred de kunwald



(No Model.)

A. DE KUNWALD. EYDRAULIG PROPELLER.

No. 426,285. Patented Apr. 22, 1890.

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WITNESSES: %a (/L Ilnrrnn *rnfrns ATFNT OFFICE.

ALFRED DE KUNIVALD, OF NEUILLY-ON-'lllE-SEINE, FRANCE.

HYDRAULIC PROPELLER.

SPECIFICATION forming part of Letters Patent No. 426,285, dated April 22, 1890.

Application filed January 24,1890. Serial No. 337,919. (No model.)

To all whom it may concern/.-

Be it known that I, ALFRED DE KUNWALD, of Neuil]y-on-the-Seine, France, a citizen of the Republic of France, have invented certain new and useful Improvements in Hydraulic Propellers, of which the following is a specification.

The obj eet of my invention is to provide a new and improved propelling device for vessels.

Great advantages can only be obtained by arranging the members of the devices for propellin g and steering in the interior of the vessel. If a floating body-such as shipis surrounded on all sides by a body that does not afford a point for applying powerfor example, waterthe means of propulsion consist in applying various devices that press against the water, and which by the recoil produced cause the displacement of the ship. Oars, paddle-wheels, and finally propeller -screws, are some of the devices used for propelling ships. The idea of using a stream of water produced by machinery in the interior of a vessel for propelling the vessel is very old, and numerous experiments have been made up to the present time to solve this question. In theory the matter is simple enough 3 but the devices used in practice caused so much trio tion in the pumps and conduits for the water that very much power was lost.

I will now describe my invention, with the accompanying drawings illustrating the same, and in Which- Figure 1 is a cross-section of my improved pump. Figs. 2, 3, 4, 5, and 6 are plan views of a vessel, showing the different ways in which it can be propelled and steered. Fig. 7 is a vertical sectional view of the pro1')elling and steering device.

Similar letters of reference indicate corresponding parts.

In Fig. 1, a, is the body or cylinder of my improved pump; 11, the piston-plunger; c, the metallic part which establishes the tight joints of the pump. (Z is the suction-tube. e is the discharge-tube.

Vhen the pump is operated, the water is drawn through the tube (Z into the pump-cylinder, when the piston-plungerb rises. \Vhen the piston-plunger descends, the water passes out through the tube 6. During a short time the water in the pump is without pressure, and a small quantity of water passes in between the metallic walls and acts as a lubricant, thus causing the pump to operate with very little friction or loss of power.

In Fig. 2, a represents the top view of a vessel. The inlet and outlet tubes cl and e of the pump are arranged in the rear part of the vessel and have the position shown by a; 0:, Fig. 2. If these tubes are thus arranged and the water drawn in through the tube (1 and ejected through the tube 6, it moves or propels the vessel in the direction of the arrow f Fig. 2. It the movement of the vessel is to be reversed, it is only necessary to reverse the position of the tubes (Z and e, as shown in Fig. 3, the direction being indicated by the arrow f. If the vessel is to be steered while moving forward and is to describe a curve of greater or less radius, as indicated by the arrow f*, Fig. 4, it is only necessary to adjust the tubes d and e at a greater or less angle to the longitudinal axis of the vessel, as shown in Fig. 4.

To steer the vessel when moving backward, as indicated by the arrow f, Fig. 5,the tubes d and e are reversed the same as for moving backward, and are then adjusted at a proper angle to the longitudinal axis of the vessel.

To turn the vessel on its own center, it is only necessary to adjust the tubes (Z and e, as indicated in Fig. 6, the arrow indicating the manner in which the vessel turns.

- In Fig. '7, a and b are two like cog-wheels engaging the pinion 0 m is the suction-tube of the pump, and n the discharge-tube, both of which are fixed. Through them the rods Z Z pass, the upper ends of which are secured to the wheels a and b and their lower ends are connected with the elbow-tubes o o, the upper ends of which turn in boxes it, eonnected with the tubes m and u. If the vessel is to be steered in any one of the directions indicated in Figs. 2, 3, -l, 5, and 6, it is only necessary to turn the handle y, connected with the pinion 0 whereby the wheels a b and the elbow-tubes o 0 are turned in the proper direction and brought into position with the proper angle of inclination to the longitudinal axis of the vessel;

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The combination, with a marine vessel, of a combined suction and force pump, an independent suction-pipe and an independent outlet-pipe connected with said pump, a rotative elbow connected with each of said pipes, the outer arms of said elbows projecting" horizontally along the under side of the bottom of the vessel, and mechanism for turning said elbow simultaneously in opposite directions, substantially as set forth.

2. The combination, with a marine vessel, of a combined suction and force pump, an independent suction-pipe and an independent outlet-pipe connected with said pump, a rotative elbow connected with each of said pipes and projecting beyond the outer surface of the bottom of the vessel, gearwheels connected with said elbows, and a pinion engaging both of said gear-wheels, substantially as set forth.

3. The combination, with a marine vessel,

of a combined suction and force pump, an in- ALFRED DE KUNVVALD.

W'itnesses:

J. L. RATHBoNE, J. CHATEL. 

